Suppose the force acting on a tennis ball (mass 0.060 kg) points in the +X direction and is given by the graph of Figure 7.33 as a function of time. Use graphical methods to estimate the velocity of the ball after being struck, assuming the ball is being served so it is nearly at rest initially?

a
18 m/s
b
21m/s
c
25 m/s
d
32 m/s